<template>
  <div class="swiper-container" ref="imageSwiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(image,index) in imageList" :key="image.id" >
        <img :src="image.imgUrl" :class="{active:defaultIndex===index}" @click="changeImg(index)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

  import Swiper from 'swiper'
  export default {
    name: "ImageList",
    data(){
    return{
      defaultIndex:0
    }
    },
    props:['imageList'],
    methods:{
      changeImg(index){
        //点击图片切换图片的橘色框
        this.defaultIndex=index
        //通知兄弟组件zoom切换图片
        this.$bus.$emit('changeDefaultIndex',index)
      },

    },
    watch: {
      imageList: {
        immediate: true,
        handler(newVal, oldVal) {
          this.$nextTick(() => {
            new Swiper(this.$refs.imageSwiper, {
              slidesPerView:3,//每一屏需要3张
              slidesPerGroup:3, //切换几张
              // 如果需要前进后退按钮
              navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
              },
            })
          })
        }
      }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        //&:hover {
        //  border: 2px solid #f60;
        //  padding: 1px;
        //}
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>